Clip-on fan



FIG. 1 is a front, top, right perspective view of a clip-on fan, showing my design.

FIG. 2 is a rear, bottom, left perspective view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a rear elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a right side elevation view thereof.

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The details shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a clip-on fan, as shown and described. 